Hank I wondered if you just was a retired fella that speared all the time and you must help family's buy giving them fish to eat, cause that's more fish for any one family can eat that you post on your pics.
Our cold waters has more sealife then you would Imagine, not so much for spearing, just overall. we can collect enough to make you not want to eat it, cause we have so many different and just so much, swimming scallops, clams, crab, octopus,musscles and of course shrimp.
Zky is correct you do not need a ton of gear, my diving as of yesterday has changed to shallower spearing, a single 7mm wetsuit, 18 pound weight belt a 70's plastic harness. and a 1st & 2nd stage and a j valve, speargun and a stringer. No need for any other gauges, max depth is a bit over 100'.
Warm water divers are not so much a less diver as there are so many great places to do very deep dives, cold water divers will not know how to take al80's 200' + and enjoy a great dive. I do it here all the time, it is no different in cold or warm, bad vis means nothing to me.
So if you want to add a drysuit a boat with a cabin sure you can add more gear but there is no reason. this year the topside even on monday and tuesday warm air on SI to warm you for next dive.
Decompression diving to deep depths will require a drysuit in cold water, so it depends on the diving you do on what you want to wear.
Coldwater divers are not better just dive differently.